NMR echo data inversion method and device based on m-sparse algorithm

A technology of echo data and nuclear magnetic resonance, applied in the direction of complex mathematical operations, etc., can solve problems such as poor inversion results and complicated inversion process

Active Publication Date: 2020-01-03
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0005] The embodiment of the present invention provides an M-sparse algorithm-based NMR echo data inversion method and device to solve the problems of complex inversion process and poor inversion results in existing methods

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  • NMR echo data inversion method and device based on m-sparse algorithm
  • NMR echo data inversion method and device based on m-sparse algorithm
  • NMR echo data inversion method and device based on m-sparse algorithm

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Embodiment Construction

[0057] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0058] The NMR echo data inversion method based on the M-sparse algorithm provided by the embodiment of the present invention can be applied to the NMR logging data processing process of oil and natural gas. Specifically, the inversion kernel matrix is ​​determined through the NMR sampling parameters, and an objective function is constructed accor...

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Abstract

An embodiment of the invention provides a nuclear magnetic resonance echo data inversion method and device based on M-sparse algorithm. The method includes: establishing a target function on the basisof an inversion nuclear matrix and collected nuclear magnetic resonance echo data, wherein the number of non-zero elements in solutions of the target function is smaller than a preset threshold value, and no regularization item is not included in the target function; using the M-sparse algorithm to solve the target function to acquire inversion spectra of the nuclear magnetic resonance echo data.No regularization item is included in the target function, so that solving of regularization parameter is not needed in the process of inversion, inversion processes are simplified, and inversion speed is increased.

Description

technical field [0001] Embodiments of the present invention relate to nuclear magnetic resonance technology, in particular to a method and device for inversion of nuclear magnetic resonance echo data based on an M-sparse algorithm. Background technique [0002] Nuclear magnetic resonance logging is the expansion and application of nuclear magnetic resonance technology in oil and gas exploration and development in the petroleum industry. The physical basis of this technology is to use the magnetism of the hydrogen nucleus itself and its interaction with an external magnetic field. Specifically, by measuring the nuclear magnetic resonance relaxation properties of hydrogen nuclei in the formation pore fluid to detect formation pore characteristics and identify fluid properties, it has become an important measurement technology in the exploration and development of major oil and gas fields in the world. [0003] The original data collected by nuclear magnetic resonance logging i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/15G06F17/16
CPCG06F17/15G06F17/16
Inventor 谢然红郭江峰金国文高伦刘秘
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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